feat: persist selected provider and keys globally via node backend, remove Claude, Azure, and MiniMax from UI

server.js

@@ -0,0 +1,103 @@
+import http from 'http';
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const PORT = process.env.PORT || 8080;
+const DIST_DIR = path.join(__dirname, 'dist');
+const CONFIG_DIR = path.join(__dirname, 'data');
+const CONFIG_FILE = path.join(CONFIG_DIR, 'config.json');
+
+// Ensure config dir exists
+if (!fs.existsSync(CONFIG_DIR)) {
+  fs.mkdirSync(CONFIG_DIR, { recursive: true });
+}
+
+const MIME_TYPES = {
+  '.html': 'text/html',
+  '.css': 'text/css',
+  '.js': 'text/javascript',
+  '.json': 'application/json',
+  '.png': 'image/png',
+  '.jpg': 'image/jpeg',
+  '.gif': 'image/gif',
+  '.svg': 'image/svg+xml',
+  '.ico': 'image/x-icon',
+};
+
+const server = http.createServer((req, res) => {
+  // CORS headers
+  res.setHeader('Access-Control-Allow-Origin', '*');
+  res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
+  res.setHeader('Access-Control-Allow-Headers', 'Content-Type');
+
+  if (req.method === 'OPTIONS') {
+    res.writeHead(204);
+    res.end();
+    return;
+  }
+
+  // API Config GET
+  if (req.url === '/api/config' && req.method === 'GET') {
+    res.writeHead(200, { 'Content-Type': 'application/json' });
+    if (fs.existsSync(CONFIG_FILE)) {
+      try {
+        const data = fs.readFileSync(CONFIG_FILE, 'utf-8');
+        res.end(data);
+        return;
+      } catch (err) {
+        // Fallback
+      }
+    }
+    res.end(JSON.stringify({}));
+    return;
+  }
+
+  // API Config POST
+  if (req.url === '/api/config' && req.method === 'POST') {
+    let body = '';
+    req.on('data', chunk => {
+      body += chunk.toString();
+    });
+    req.on('end', () => {
+      try {
+        const parsed = JSON.parse(body);
+        fs.writeFileSync(CONFIG_FILE, JSON.stringify(parsed, null, 2), 'utf-8');
+        res.writeHead(200, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ success: true }));
+      } catch (err) {
+        res.writeHead(400, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ error: 'Invalid JSON or write error' }));
+      }
+    });
+    return;
+  }
+
+  // Serve static files
+  let filePath = path.join(DIST_DIR, req.url === '/' ? 'index.html' : req.url);
+  
+  // If path doesn't exist, fallback to index.html (SPA routing)
+  if (!fs.existsSync(filePath) || fs.statSync(filePath).isDirectory()) {
+    filePath = path.join(DIST_DIR, 'index.html');
+  }
+
+  const ext = path.extname(filePath);
+  const contentType = MIME_TYPES[ext] || 'application/octet-stream';
+
+  fs.readFile(filePath, (err, content) => {
+    if (err) {
+      res.writeHead(500);
+      res.end('Server Error');
+    } else {
+      res.writeHead(200, { 'Content-Type': contentType });
+      res.end(content);
+    }
+  });
+});
+
+server.listen(PORT, () => {
+  console.log(`Server running on port ${PORT}`);
+});